Perhaps your refer to a Weather Widget. Touch-and-hold (i.e., long-touch) the Widget…
- If you wish to remove the Widget, select Remove Widget.
- If you wish to change the displayed location to another city, select Edit Widget, tap Location then select the preferred city or Current Location.
If instead you are attempting to change the list of cities of interest within the Weather App itself - open the Weather App; within the associated sidebar you will see a list a locations for which a forecast has been configured. At top-right of the Weather sidebar, tap the ellipsis (“…”) icon - and from the menu tap Edit List.
Each of your configured locations will now have an associated red “-“ button. Tap the button for each location that you wish to delete from the Weather App. When you’re finished, tap Done. Locations can be added by using the Search function; you may need to select a nearby town or city.
You perhaps need to understand that only WiFi+Cellular models of iPad have GNSS/GPS capabilities - this being a function of the iPad Cellular chipset. WiFi Only models of iPad have no GPS capabilities with which iPad Location Services can derive precise location. This fundamental difference may significantly impact your ability to use mapping or other Apps that rely upon precise location for optimal functionality.
WiFi Only iPad models can only “infer” their location from a database lookup of neighbouring WiFi networks for which the geographic location is known, or the geographic location of your public IP address. For static applications in urban locations, where the location of IP public IP addresses and WiFi networks are known, an “inferred” location can be relatively accurate. However, in rural locations, or when using a Cellular/Satellite/VPN connection, location accuracy of an inferred location [if it works at all] may be very inaccurate.